Jotul F 500 2014 Firebox possible issue

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Electrician

New Member
Nov 1, 2021
4
Winterport Maine
Hello all,

Thanks in advance for taking the time to look at my problem. While cleaning my Jotul F 500 stove for this season I pulled it away from the chimney thimble and saw this (see picture). The gaps that I circled go straight through to the firebox. They are about 3/8" at their widest point.

I don't understand how the airflow of this stove works very well, but it looks like this gap is giving the air/heat a direct path from the firebox to the chimney, so I'm going to lose a lot of efficiency.

Can I fix the gaps using a cement, or does this need more intensive work?

Firebox Gaps.jpg
 
Good eye. It looks like the baffle board is breaking down and is ready for replacement.
 
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I'd at least stuff some rope gasket in the gap to stop leakage bypassing the secondary burn system and heading right up the flue.
 
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